Manufacture of steel from ordinary iron.



PATENTED NGV. 20, 1906.

y A. MASSON, JR. MANUFAGTURB 0F STEEL FROM ORDINARY IRoN.

APPLIOATIKLN FILED JAN.23. 1906.

ADAM-MASSOTT, JR., OF

ANDRE, or HAARDT, NEAE MUTTERSTADT, GERMANY, ASSIGNOR TO FRITZ NEUSTADT A/ H., GERMANY.

NlNUF- ACTURE OF STEEL FROM ORDINARY IRONl Specification of Letters Patent.

rammed Nov. 2o, 1906.

'Appnmion iiieiiapuary zaieoel smart. 297,530.

To a/ZZ whom it may concern:

Be it known that I` ADAM MAssoTT, Jr.,

merchant, a subject of the King of Bavaria,

anda resident of Mutterstadt, in the Palatinate, Germany, have invented new and use-y ful Improvements in the Manufacture of Steel from Ordinary Iron, of which the following is a speciication.

My invention relates to a new process for preparing from ordinary `iron steel the appearance and properties of which are equal to those of the best crucible cast-steel hitherto known.

The process is carried out in the way usual in cementing methods, the following mixture being used: three hundred grains yellow ferrocyanid of dpotassium, two hundred grams size repare from leather parings, two hundre grams charcoal powder, one hundred and eighty grams col0phony,twenty grams soda, forty grams finelyscreened earth, twenty-five grams nitrate of peta-sh, and thirty-tive grams graphite. The iron masses to be converted are well packed in this powder and heated until bright red. The heat is maintained until the conversion has completely taken place. For bar-iron of ordinary dimensions this process requires about five hours. If it be desired to have only a partial conversion-thatis to say, so that there should remain an inner iron'core-the time will be correspondingly shortened. About one kilogram of the mixture is required for three and one-half kilograms of metal.

In carrying out the process it is essential that the munie-furnace in which the iron to be converted is placed should be properly closed,v so as to prevent thid escape of the gases generated.

A furnace for carrying out the process is illustrated by way of example in the accompanying drawings. Y

Figure 1 is a longitudinal section on line A B of Fig. 2. :Fig: 2 is a cross-section on line C D of Fig. 1.

a is a mufHe made up of separate sections. This muflie in which iron bars or iron articles are placed in the powder described is covered by plates l) in such manner asto produce round the muffle a chamber c, into which the combust1on-gases from the grating j pass through the slots g. From the chamber c the gases pass into the collector d, whence they escape into the chimney e. it will be seen that in this way on the one hand the retorts are properly closed, and on the other hand, a good and uniform cooling of the same is attained.

Having now particularly described and ascertained the nature of my said invention and in. what manner the same is to be perlformed, l declare that what l claim is l. A method of manufacturing steel from ordinary iron and inferior sorts of steel, consisting in heating the metal in a furnace to white heat, in contact with a material composed of ferroeyanid of potassium, leather size, carbon powder, colophony, finelyscreened earth and soda with simultaneous addition of nitrate ol' potash and graphite, substantially as described.

2. A method of vmanulecturing steel from ordinary ironand inferior sorts ol' steel, consisting in heating the metal in an air-tight retort to white heat, and surrounding the anid of potassium, leather size, carbon powder, colophony, finely-screened earth, graphite, potassium nitrate and soda.

3. The method of manufacturing steel from ordinary iron and inferior grades of steel, consisting in heating the metal in a furnace to a white heat, in contact with a inaterial composed of three hundred parts by Weight of ferrocyanid of potassium, two hundred. parts by weight of size made from leather p arings, two hundred parts by weight of powdered charcoal, one hundred and eighty parts by weight of colophony, twenty parts by weight of soda, forty parts by weight of inely-screened earth, twenty-five parts by weight of potassium nitrate, and thirty-five parts by weight of graphite.

4. rlhe method of manufacturing Asteel from ordinary iron, and inferior grades of stoel, consisting in heating the metal in an air-tight retort to a white heat, and surlrounding the metal with a material com posed of three hundred parts by weight 0f l'miocyanid of potassium, two hundred l, 'parts by weight of size made from leather l parings, two hundred parts by weight powmetal with a material composed of ferrocydered `charcoal, one hundred and eighty i my invention I have signed my name, in parts by Weight oolophony, twenty parts by presence oftwo Witnesses, this 10th dey of weivht of soda, forty parte by weight of f January, 1906.

iineI -screened earth, and twenty-five 4parts g ADAM MASSOTT, JU, 5 by weight of potassium nitrate7 and thirtyj, Witnesses:

five partsby weight of graphite. N. C. SCHLEMMER,

In testimony that I claim the foregoing as Jos. II. LEUTE. 

